Research Article Search Results
Ruby with Synthetic Overgrowth Lining Cavities
An unusual area of granular texture lining the cavity of a ruby indicates synthetic overgrowth.
New Production of Sapphire from Matepwende, Tanzania
Reports on the study of sapphire samples from a newly discovered source in southern Tanzania.
A Multicore Non-Bead Cultured Pearl
A non-bead cultured pearl with six cores is discovered in a large lot of pearls submitted to the Mumbai laboratory.
Fireworks Display in Russian Emerald
The inclusion scene in a Russian emerald resembles fireworks illuminating a night sky.
Zoned Trapiche Emerald with Goshenite Overgrowth
A 12.62 ct trapiche emerald with areas of goshenite is analyzed in GIA’s Tokyo laboratory.
Arzakite Inclusion in Ruby from Mogok
A report on the first documented arzakite inclusion in a Mogok ruby.
Colored Bands in CVD-Grown Diamond
A CVD-grown diamond submitted to the Surat laboratory exhibits a growth remnant appearing as a colored band.
Classification of Gem Materials Using Machine Learning
Explores the application of several machine learning models to complement traditional gem classification approaches.
Observations of Oval-, Pear-, and Marquise-Shaped Diamonds: Implications for Fancy Cut Grading
Presents findings from observations of oval-, pear-, and marquise-shaped diamonds, laying the groundwork for a fancy cut grading system.
The Extraordinary Backstory of Natural Diamonds: A Diamond Is (and Has Been) Forever
Examines new developments in the story of diamond formation and their extraction from the earth.
Splendors from the Deep: Historic Treasures from a Spanish Shipwreck
An in-depth look at jewelry recently recovered from a 1715 Spanish shipwreck.
“Cotton Pearl” Imitations
An in-depth look at a new pearl simulant gaining popularity in the fashion jewelry market.
